Cutter-head.



Uri t ns ELMER S. SHIMER, OF MILTON, PENNSYLVANIA.

CUTTER-HEAD.

SPECIFICATION forming part of Letters Patent N0. 719,266, dated January27, 1903.

Application filed July 22, 1902. Eerial No. 116,594. (No model.)

To ctZZ whom it may concern:

Beit known that I, ELMER S. SHIMER, a citizen of the United States,residing at Milton, in the county of Northnmberland and State ofPennsylvania, have invented new and useful Improvements in Cutter-Heads,of which the following is a specification.

My invention relates to improvements in cutter-heads of the Shimer type;and the object of the same is to construct a device of this characterwhich will have a minimum of superfluous metal therein.

The simple and novel construction employed by me in carrying out myinvention is fully described in this specification, and

claimed, and illustrated in the accompanying drawings, forming a partthereof, in which Figure 1 is a side elevation of my improved head. Fig.2 is a bottom plan of the same. Fig. 3 is a side elevation of thecasting out of which my head is formed.

Like numerals of reference designate like parts in the difierent viewsof the drawings.

The numeral 1 designates a hub bearing a flange 2, which is crimped orundulating and comprises alternate plane and curved portions 3 and l,respectively. One face 5 of each of the plane portions 3 lies in thesame plane of revolution of the cutter-head,and they are thus adapted toform seats for bits, (not shown,) secured by bolts passing throughapertures 6 in the seats. The bit-seats 5 arelocated diametricallyopposite each other in- The members of each pair lie on the pairs.

same side of the flange 2, but alternate seats lie on opposite sides ofthe flange.

In forming a flange 2 bearing bit-seats, as above described, a forging 7is first made, having a plane circular flange 8 of uniform thicknessthereon. This forging is then heated and crimped by a die under heavypressure, after which the apertures 6 are drilled therein. By thismethod of construction a great saving of material is effected withoutweakening the cutter-head in the least.

I do not wish to be limited as to details of construction, as these maybe modified in many particulars without departing from the spirit of myinvention.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A cutter-head comprising a hub bearing a flange of substantiallyuniform thickness having alternate offset portions forming bitseats andconnected by gradually-deflecting portions,'substantially as described.

2. A cutter-head comprising a hub bearing a flange of uniform thicknesshaving laterallyoffset truly radial portions continuous therewith,substantially as described.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

' ELMER S. SHIMER.

Witnesses:

WV. H. BECK, H. A. KERR.

